Pension And Other Postretirement Benefits (Schedule Of Net Periodic Benefit Costs) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Total selling, general, and administrative expenses	$ 277.9	$ 290.1
Total non-operating expenses	7.8	7.5
Pension Benefits
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	7.6	7.2
Total selling, general, and administrative expenses	7.6	7.2
Interest cost	6.1	7.0
Expected return on plan assets	(7.8)	(8.4)
Net actuarial loss	8.6	7.2
Total non-operating expenses	6.9	5.8
Net periodic benefit cost	14.5	13.0
Postretirement Benefits
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	0.6	0.5
Total selling, general, and administrative expenses	0.6	0.5
Interest cost	0.4	0.6
Net actuarial loss	0.3	0.2
Total non-operating expenses	0.7	0.8
Net periodic benefit cost	$ 1.3	$ 1.3